La Houille Blanche
Number 8, Décembre 1993
|Page(s)||539 - 550|
|Published online||01 October 2009|
Analyse comparée des effets de dragage et de chasse hydraulique sur l'envasement à l'amont du bassin maritime de la Rance
Comparative study of dredging and flushing effects on sedimentation in the upper part of the Rance estuary
Laboratoire de Géomorphologie E.P.H.E. URA 904 du CNRS " Dynamique et gestion des espaces littoraux " 15 boulevard de la mer, 35800 Dinard
Since a few years, an exceptional muddy sedimentation increase was observed in the upper part of the Rance estuary, and a dredging of the navigation channel was required. But the dredged sediments were transported at a short distance only because ebb current is too weak to allow the discharge of suspended load in the lower part of the maritime basin. The excess of fine particles deposition is linked to drought and a low river inflow during three years in a row. A fluvial basin located at the upper part of the marine stretch of the estuary can be used for hydraulic flushing which happens to be more efficient for fluid mud resuspension and translation of the turbidity maximum towards the outer part of the Rance estuary.
© Société Hydrotechnique de France, 1993
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.